Vulnerability CVE-2011-4613

Vulnerability Name:

CVE-2011-4613 (CCN-71847)

Assigned:

2011-12-15

Published:

2011-12-15

Updated:

2020-08-24

Summary:

The X.Org X wrapper (xserver-wrapper.c) in Debian GNU/Linux and Ubuntu Linux does not properly verify the TTY of a user who is starting X, which allows local users to bypass intended access restrictions by associating stdin with a file that is misinterpreted as the console TTY.

CVSS v3 Severity:

9.3 Critical (CCN CVSS v3.1 Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H)

Exploitability Metrics:	Attack Vector (AV): Local Attack Complexity (AC): Low Privileges Required (PR): None User Interaction (UI): None
Scope:	Scope (S): Changed
Impact Metrics:	Confidentiality (C): High Integrity (I): High Availibility (A): High

CVSS v2 Severity:

4.6 Medium (CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P)
3.4 Low (Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:P/I:P/A:P/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): Partial Integrity (I): Partial Availibility (A): Partial

7.2 High (CCN CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C)
5.3 Medium (CCN Temporal CVSS v2 Vector: AV:L/AC:L/Au:N/C:C/I:C/A:C/E:U/RL:OF/RC:C)

Exploitability Metrics:	Access Vector (AV): Local Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): Complete Integrity (I): Complete Availibility (A): Complete

Vulnerability Type:

CWE-264

Vulnerability Consequences:

Bypass Security

References:

Source: CCN
Type: Debian Bug report logs - #652249
bypass default security level of the X wrapper

Source: MISC
Type: Vendor Advisory
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=652249

Source: MITRE
Type: CNA
CVE-2011-4613

Source: DEBIAN
Type: Vendor Advisory
DSA-2364

Source: CCN
Type: BID-51082
X.Org X Server X wrapper Local Security Bypass Vulnerability

Source: UBUNTU
Type: Vendor Advisory
USN-1349-1

Source: CCN
Type: X.Org Foundation Web site
X.Org Wiki - Home

Source: XF
Type: UNKNOWN
xorg-xwrapper-security-bypass(71847)

Vulnerable Configuration:

Configuration 1:

cpe:/a:x.org:x_server:-:*:*:*:*:*:*:*

OR cpe:/o:canonical:ubuntu_linux:10.04:-:lts:*:*:*:*:*

OR cpe:/o:canonical:ubuntu_linux:10.10:*:*:*:*:*:*:*

OR cpe:/o:canonical:ubuntu_linux:11.04:*:*:*:*:*:*:*

OR cpe:/o:canonical:ubuntu_linux:11.10:*:*:*:*:*:*:*

OR cpe:/o:debian:debian_linux:*:*:*:*:*:*:*:*

OR cpe:/o:ubuntu:linux:*:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.mitre.oval:def:14490	P	USN-1349-1 -- X.Org vulnerability	2014-06-30
oval:org.mitre.oval:def:14754	P	DSA-2364-1 xorg -- incorrect permission check	2014-06-23

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